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VALUES Clause in SQLAlchemy
When working with relational databases, the VALUES clause is often used to define a temporary table or "inline" data source within a query. This can be useful in various scenarios, such as combining data from multiple sources or creating a temporary dataset for analysis.
In SQLAlchemy, the VALUES clause is not natively supported in the same way as in direct SQL queries. However, there is a workaround that allows you to achieve the equivalent functionality using SQLAlchemy's Core API.
Building a Query with the VALUES Clause
To create a SQLAlchemy query that replicates the functionality of the given SQL statement:
SELECT * FROM (VALUES (1, 2, 3)) AS sq;
You can use the following code:
from sqlalchemy import select, column, Integer from sqlalchemy.sql import Values query = select(Values(column('Number', Integer), name='sq').data([(1,), (2,), (3,)]))
In this code:
By executing this query, you will get a result set that contains three rows, each with a single column named Number containing the values 1, 2, and 3, respectively. It is important to note that the VALUES clause is not widely documented in SQLAlchemy's official documentation. However, you can refer to the test cases at https://github.com/sqlalchemy/sqlalchemy/blob/master/test/sql/test_values.py for further insights.
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